variac question

dhole · 14th March 2005, 10:22 AM

Hi People

I just bought a variac for my audio projetcs. The only thing being I dont think it will be too usefull. I have bought a claude Lyons duratrak 8A 2KVA. I did want to use it to bring up my aleph amps. Only thin is it only has a single set of outputs. I cant simpulate the twin output toroidals I will use for the alephs. Could anyone advise as to what type of variac I need.
regards
dave

dhole · 14th March 2005, 10:41 AM

oh yeah I'm in the uk ....

Netlist · 14th March 2005, 11:21 AM

From what I understand you’d like to regulate the secundaries of your transfos.
A variac is typically used to regulate the mains power supply.

/Hugo

dhole · 14th March 2005, 11:26 AM

I guess yeah I didnt understand the usage of the variac. It would be use full to connect it to the toroidal and bring its voltage up to mains level..... I have an idea of using it in replacement of a toroidal... not thinking straight.....

Ouroboros · 14th March 2005, 11:29 AM

Don't forget that a Variac is only an autotransformer, so there's no isolation.

Netlist · 14th March 2005, 12:10 PM

Careful, I don't know your particular transformer but keep in mind that the output is almost sure AC. You can't use it as a DC source.
Take utmost care when dealing with AC mains voltage.

/Hugo

dhole · 14th March 2005, 12:18 PM

yeah I do know that..... I may be stupid but I do know that....

Bas Horneman · 14th March 2005, 12:21 PM

Quote:

yeah I do know that..... I may be stupid but I do know that....

Nothing to do with stupidity...

It's just that all these posts are also read by others. We want to make sure that people don't get (wrong or dangerous) ideas and get themselves electrocuted.

14th March 2005, 10:22 AM	#1
dhole diyAudio Member Join Date: Jul 2004 Location: Brighton	variac question Hi People I just bought a variac for my audio projetcs. The only thing being I dont think it will be too usefull. I have bought a claude Lyons duratrak 8A 2KVA. I did want to use it to bring up my aleph amps. Only thin is it only has a single set of outputs. I cant simpulate the twin output toroidals I will use for the alephs. Could anyone advise as to what type of variac I need. regards dave

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14th March 2005, 10:41 AM	#2
dhole diyAudio Member Join Date: Jul 2004 Location: Brighton	oh yeah I'm in the uk ....

14th March 2005, 11:21 AM	#3
Netlist diyAudio Moderator Join Date: Jan 2003	From what I understand you’d like to regulate the secundaries of your transfos. A variac is typically used to regulate the mains power supply. /Hugo

14th March 2005, 11:26 AM	#4
dhole diyAudio Member Join Date: Jul 2004 Location: Brighton	I guess yeah I didnt understand the usage of the variac. It would be use full to connect it to the toroidal and bring its voltage up to mains level..... I have an idea of using it in replacement of a toroidal... not thinking straight.....

14th March 2005, 11:29 AM	#5
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	Don't forget that a Variac is only an autotransformer, so there's no isolation.

14th March 2005, 12:10 PM	#6
Netlist diyAudio Moderator Join Date: Jan 2003	Careful, I don't know your particular transformer but keep in mind that the output is almost sure AC. You can't use it as a DC source. Take utmost care when dealing with AC mains voltage. /Hugo

14th March 2005, 12:18 PM	#7
dhole diyAudio Member Join Date: Jul 2004 Location: Brighton	yeah I do know that..... I may be stupid but I do know that....

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